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  <meta charset="UTF-8">
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  <title>Document</title>
</head>

<body>
  <script>
    // console.log('qwertyuyuop'.length)  // 字符串长度的获取

    // console.log( 'qwer' + 'df' )  //qwerdf

    // console.log( 'qwer' + 12 )  //qwer12

    var age = 88

    // var str = '我今年' + age + '岁了'  // 我今年88岁了

    var str = '我今年' + age + '岁了'  // 引引加加

    console.log(str)
  </script>
</body>

</html>